ECAT Mathematics Chapter 23 Pre Engineering Online Test With Answers

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ECAT Mathematics Chapter 23 Pre Engineering Online Test

Sr. # Questions Answers Choice
1 If the sum of two unit vectors is a unit vector the the magnitude of their difference is √2 √3 1 None of these
2 The vector k = [0,0,1] is called unit vector along: x -axis y - axis z- axis None of these
3 Vector i = [1,0] [0,1,0] [0,0,1] None of these
4 The vector i = [1,0] is called unit vector along: x-axis y - axis z- axis Botha a and y-axis
5 O (0,0)is called: Position vector Free vector Unite vector Null vector
6 Vector additon is: Commutative Associative Commutative and Associative None of these
7 The positive real number which is the measure of the length of a vector is called the Unit vector Modulus Inverse None of these
8 If|a| =|b| = |a+b|=1, then|a-b| is equal to: 1 √3 √2 7
9 If|a| =|b|=|a + b|=1, then|a+ b| = 5, then|a-b| = 4 6 5 3
10 If a = 2i +2j, b= 3i -j and c=4i +5j, the 3b -a-2c = -i -15j i-15j i-3j None of these
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